Protein
KH domain-containing, RNA-binding, signal transduction-associated protein 2
Function
RNA-binding protein that plays a role in the regulation of alternative splicing and influences mRNA splice site selection and exon inclusion (By similarity). Binds both poly(A) and poly(U) homopolymers. Phosphorylation by PTK6 inhibits its RNA-binding ability. Induces an increased concentration-dependent incorporation of exon in CD44 pre-mRNA by direct binding to purine-rich exonic enhancer (By similarity). Can regulate alternative splicing of neurexins NRXN1-3 in the laminin G-like domain 6 containing the evolutionary conserved neurexin alternative spliced segment 4 (AS4) involved in neurexin selective targeting to postsynaptic partners. Regulates cell-type specific alternative splicing of NRXN1 at AS4 and acts synergystically with SAM68 in exon skipping. In contrast acts antagonistically with SAM68 in NRXN3 exon skipping at AS4 (PubMed:22196734, PubMed:24469635). Its phosphorylation by FYN inhibits its ability to regulate splice site selection (By similarity). May function as an adapter protein for Src kinases during mitosis (PubMed:10077576).
Similarity
Belongs to the KHDRBS family.
Sequence
MGEEKYLPELMAEKDSLDPSFVHASRLLAEEIEKFQGSDGKKEDEEKKYLDVISNKNIKLSERVLIPVKQYPKFNFVGKLLGPRGNSLKRLQEETGAKMSILGKGSMRDKTKEEELRKSGEAKYAHLSDELHVLIEVFAPPGEAYSRMSHALEEIKKFLVPDYNDEIRQEQLRELSYLNGSEESGRGRGIRGRGIRITPTAPSRGRGGAVPPPPPPGRGVLTPRGTTVTRGALPVPPIARGVPTPRARGTAAVPGYRAPPPPAHDAYEEYGYDDGYGGEYDDQTYEAYDNSYVTPTQSVPEYYDYGHGVNEDAYDSYAPEEWATTRSSLKAPPPRSARGGYREHPYGRY